OpenCV 3.4

Right before the Christmas and New Year holidays, we are glad to present the latest and the greatest OpenCV 3.4.

What's new

Further improvements in the DNN module include faster R-CNN support, Javascript bindings and acceleration of OpenCL implementation.

We've implemented a disk cache and manual loading for precompiled OpenCL kernel binaries, it can greatly reduce initialization time of many applications and allow to run OpenCL implementations on embedded platforms without JIT compiler.

One more bit-exact algorithm has been implemented. New 8-bit bilinear resize will lay stable base for complex computer vision pipelines across variety of platforms.

One more GSoC project has been integrated - it adds implementations of new background subtraction algorithms.

~250 patches have been merged since OpenCV 3.3.1 and over 200 issues have been closed